JKSSB Conservation Assistant Syllabus

Download JKSSB Conservation Assistant Exam Syllabus

Total Marks 120                                                                                                                                                Time 2 Hours

Part –I: 16 Marks

Part-II: 8 Marks

Delocalized Chemical bonding

                Conjugation, Cross conjugation, rule of resonance, steric inhibition of resonance.

Aromaaticity: Huckel rule and concept of aromaticity, Molecular orbital description of aromaticity and antiaromaticity, Relation between NMR and aromaticity. Annulenes (Two to more than ten-electronic system), Aromaticity of hetero annulenes and fullerenes (C-60). Homoaromaticity.

Hyper conjugation: Explanation of hyper conjugative effect, isovalent and sacrificial hyper conjugation.

Part-III: 8 Marks

Stereochemistry:

Elements of symmetry, Chirality due to chiral cnetre, molecules with more than one Chiral centre, thero and erythron isomers optical activity in the absence of chiral carbon (biphenyls, allenes and spirans). Chirality due to helical shape. Enantiotropic and diastereotropic atoms, groups and faces.

Part-IV: 8 Marks

Reaction Mechanism/Structure and reactivity

                Types of mechanisms. Types of reactions, thermodynamic and kinetic requirements.

Effect of structure on reactivity

                Resonance and field effects, steric effect, quantitative treatment

Part-V 8 Marks

Aliphatic Electrophilic substitutions

General mechanism of SE1, SE2 and SEireacctions, Mechanism of reactions involving migration of double bond. Effect of substrate, leaving group and solvent on reactivity.

Aliphatic Nucleophilic substitutions

Mechanisms and stereochemical implications of SN2, SN1, SNiandneighbouring group participation (by double and single-single-bonds) reactions. Effect of substrate structure, attacking nucleophile, leaving group and solvent on the rates of SN1 and SN2 reacitons.

Part-VI: 8 Marks

Elimination reactions:

Discussion of E1, E2, E1cB and E2C mechanisms. Effect of substrate structure base and the leaving group on reactivity. Competition between substitution and elimination reactions. Stereochemistry and orientation of E2 elimination. Mechanism and orientation inpyrolytic eliminations, Shapiro reaction.

Part-VII 8 Marks

Aromatic Electrophilic Substitution

The arenium ion mechanism, orientation and reactivity, energy profile diagrams. The ortho/ratio, ipso attack. Orientation of substitution in benzene rings having more than one substituents. Orientation in other ring systems. Mechanisms of diazonium coupling, Vilsmier-Haackand Gattermann-Koch reactions and Fries rearrangement.

Part-VIII: 8 Marks

Aromatic Nucleophilic substitution

Discussion of different mechanism (SN1; SNAr, Benzyne and srn!) Structure reactivity relationships. Effect of leaving group and attacking nucleiphile. Mechanisms of Von-Richter, Sommelet-Hauser and Smiles arrangements and Chichibabin reaction.

Part-IX: 8 Marks

Free Radical Substitution

Free radical substitution mechanisms. Mechanism at an aromatic substrate, neighboring group assistances, reactivity for aliphatic and aromatic substrates. Reactivity in the attacking radical. Effect of solvent on reactivity. Allylic alogenations (NBS), oxidation of aldehydes to carboxylic acids, auto-oxidation, coupling of alkynes and arylation of aromatic compounds by diazonium salts, Sandmayer reaction, free radical rearrangement and Hunsdiecker reaction.

Part-X: 24 Marks

Part-XI: 16 Marks